B&C Technologies SA Series Industrial - Manual (Page 22)

INSTALLATION PROCEDURES
3-10
The SA models use a single – speed motor to drive the cylinder is supported via V – belts in
all speeds. The cylinder is supported by two spherical roller bearings located in a bearing housing
made of cast iron.
The motor is controlled by the computer control located in the front and the AC inverter
drive located in the rear panel. Any speed can be programmed for any wash cycle. Some speed
ranges are blocked out for programming due to safety reasons. This speed range is not important
and normally speeds for wash or extraction are not selected within this range. Any wash speed in
the range of 10 – 50 RPM and extraction speeds 150 – 660 maximum RPM can be programmed.
Further any reversing action can be programmed. Normal reversing action is 18 seconds forward,
pause for 3 seconds, and 18 seconds reverse. Any temperature between 70 ºF to 200 ºF (20 – 95 ºC)
can be programmed. Any water level in the range of the machine parameters can be programmed is
centimeters. The computers will automatically provide safety levels for steam injection and door
operations.
Water entry into the machine is through electromagnetic water valves controlled by the
computer. The computer also controls the drain, supply dispenser, any external liquid supplied,
steam injection and any other vital functions of the wash program. The computers can even record
cycles and data of importance that could be used for maintenance purpose.
The steam, if installed is injected in the bottom of the shell via a steam injector. The steam is
controlled by a steam valve that is programmed by the micro computer.
The cylinder is perforated, allowing water to pass through and drain from within during
drain and extract steps. Lifting ribs inside the cylinder lift the load from the wash solution and allow
the load to tumble and falling back into the solution when the load reaches the approximate 10 – 11
o’clock or 1 – 2 o’clock positions. This mechanical action removes soil from the fabric.
Furthermore, the lifters are perforated on the top so that water can cascade over the goods and wet
them quickly. This reduces water consumption as water is picked up at the cylinder’s lowest point
and lifted and splashed over the goods at the highest point as the cylinder rotates.
A stainless steel door is provided for loading and unloading. A door lock system prevents
operation of the machine when the door is open. The door is locked during operation utilizing an air
cylinder and a manual latch for safety reasons. The door lock is provided with magnetic sensor to
indicate that the machine is locked and provide for start of the machine when the door is closed and
locked.
The AC drive, contractor, circuit overload protectors, input power supply connections,
external supply connection, and control transformer are behind a cover of the rear of the machine.
The supply dispenser is mounted on the front of the machine and is accessed by unlatching
the cover door. Supplies, both liquid and powder may be added by pulling the dispenser cups out
and placing the appropriate supply in each. Supplies are flushed into the machine at the proper time
in the cycle, controlled by the microcomputer.
Holes are provided at the rear of the machine for connection to an external, central liquid
supply unit. Electrical connections are provided for the liquid supply unit on a terminal strip inside
the rear control module.
K. THEORY OF OPERATION